For those with experience of the Contact Form 7 plugin - When I installed it, the form worked fine, and upon pressing the submit button, there was no page load, all done via Ajax, however now the page loads upon pressing submit. I have not made any changes to the form.

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"Your question should be specific to WordPress. Generic PHP/JS/HTML/CSS questions might be better asked at Stack Overflow or another appropriate site of the Stack Exchange network. Third party plugins and themes are off topic." – birgire, mrwweb, Pieter Goosen, Johannes Pille, ialocin